[JENKINS-2841] y-axis scale configs for plot plug-in

The plot plugin is very useful for tracking multiple build/app/test metrics, but

occasionally when things go wrong an unusally large metric value reduces the

utility of the plot since the plot scales the y-axis based on the maximum value.

The workaround would require manually editing/deleting/rebuilding metrics which

in not really tenable.

So an extremely helpful enhancement would be to enable the plot config to also

accept option minimum and maximum y-axis scale values to override the current

(default) mechanism of using the maximum value of the metric to set the upper-bound.

Since 0 is currently always the lower-bound, the ability to specify a different

absolute lower-bound would enable certain plots to be much more readable as a

result of better using the plot space and making smaller relative changes much

easier to see.

For metric values that fall above/below the custom y-axis boundaries, preferably

a * would be displayed on the top/bottom of the plot window for that build and

mouse-over would reveal the actual value (as current mouse-over of plot points

does), to enable determination of actual extreme values when needed.

Also the custom y-axis bounds should not lose any metric values (data), so if at

a later point in time the bounds are changed to a different range there would be

no data loss due to the earlier customized settings for the y-axis bounds.

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Originally reported by danrrich, imported from: y-axis scale configs for plot plug-in

• assignee: dpatil
  
• status: Open
  
• priority: Critical
  
• component(s): plot-plugin
  
• resolution: Unresolved
  
• votes: 6
  
• watchers: 6
  
• imported: 20260512-210953
  

Raw content of original issue

The plot plugin is very useful for tracking multiple build/app/test metrics, but

occasionally when things go wrong an unusally large metric value reduces the

utility of the plot since the plot scales the y-axis based on the maximum value.

The workaround would require manually editing/deleting/rebuilding metrics which

in not really tenable.


So an extremely helpful enhancement would be to enable the plot config to also

accept option minimum and maximum y-axis scale values to override the current

(default) mechanism of using the maximum value of the metric to set the upper-bound.


Since 0 is currently always the lower-bound, the ability to specify a different

absolute lower-bound would enable certain plots to be much more readable as a

result of better using the plot space and making smaller relative changes much

easier to see.


For metric values that fall above/below the custom y-axis boundaries, preferably

a * would be displayed on the top/bottom of the plot window for that build and

mouse-over would reveal the actual value (as current mouse-over of plot points

does), to enable determination of actual extreme values when needed.


Also the custom y-axis bounds should not lose any metric values (data), so if at

a later point in time the bounds are changed to a different range there would be

no data loss due to the earlier customized settings for the y-axis bounds.

• environment: Platform: All, OS: All